Airbag control unit with part number 89170-76190

What does the airbag control unit 89170-76190 do?

The 89170-76190 controls the restraint system (SRS) of Lexus as a central unit. It evaluates the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system without interruption.

Faults that it detects are shown via the airbag warning light in the instrument cluster.

After an accident the control unit records crash data and locks itself.

Why does the control unit 89170-76190 fail?

Stored crash data is the most frequent cause of a failure of the 89170-76190, even if no airbag was triggered in the accident. Additionally there are ageing components, cold solder joints, moisture and corrosion on plugs, and voltage spikes.

Crash data cannot be removed with an ordinary diagnostic tool. At Airbag24 it is erased in the course of the repair.

Electronics age, and solder joints can go cold over time. Moisture in turn attacks plug connections until corrosion forms.

Voltage spikes, for example from a weak battery or from connecting jump-start cables, additionally stress the control unit.

How can you tell that the 89170-76190 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently if the 89170-76190 has a defect. Fault messages, a missing connection to the diagnostic tool and a fault memory that cannot be erased can come on top. In an emergency airbags and seatbelt pretensioners may then possibly not deploy.

This light is an unambiguous sign and requires a check.

A missing connection to the diagnostic tool need not mean that the control unit is at fault, since cables can also be the cause.

Which vehicles is the 89170-76190 fitted in?

The 89170-76190 is fitted in these vehicles: Lexus CT ZWA10 (2011-2022). The statement assigns the unit to the vehicles in which it has been used.

The list serves for comparison with your own vehicle.

• Lexus CT ZWA10 (2011-2022)

On the one hand, compare the part number on the label of the removed unit with this page, which only confirms that it is the right unit. On the other hand, read out the fault memory before removal, because the log shows whether the control unit itself is at fault or whether a cable or plug is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-02C30, 89170-76160, 89170-76210, 89170-76220.

How does the repair of the 89170-76190 work?

You read out the fault memory first and attach the log, then disconnect the battery before removing the control unit. Afterwards you create the repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

At the test bench Airbag24 examines the unit, replaces defective components, removes the crash data and carries out a functional test.

The unit comes back to you afterwards. Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 89170-76190 get to Airbag24?

The 89170-76190 reaches Airbag24 by parcel or, for an extra charge, with a UPS collection. Return after the repair is likewise made by UPS.

The printed repair order goes into the parcel, and the control unit must be packed shock-resistant.